Switch.



H. A. STEEN.

SWITCH.

APPLICATION FILED Nov. 2. I9Io.

H. A. STEEN.

SWITCH.

- APPLICAUON FILED Nov. 2. 1910. 1 155,626.` Patented oct. 5,1915.

9 a SHEETS-sneer 2.

a/ i l WAX/umano v H. A. STEEN.

SWITCH.

APPLICATION FILED-Nov. 2. |910.

Patented Oct. 5, 1915.

3 SHEETS-SHEET 3- .UNITED sTATEs PATENT OFFICE.

HALFDAN A; STEEN, 0F MILWAUKEE, WISCONSIN, ASSIG-NOR, BY MESNE ASSIGN- MENTS, TO ALLIS-CHALMERS MANUFACTURING COMBANY, A CORPORATION 0F DELAWARE.'

SWITCH.

Specification of Letters Patent.

Application filled November 2, 1910. Serial No. 590,295.

To all whom t may) concern:

Be it known that' I, HALFDAN A. STEEN, a subject of the King of Norway, residing at Milwaukee, in thecounty of Milwaukee and 'State of Wisconsin, have invented certain new and useful Improvements in Switches, of which the following isa full, clear,.and exact specification. Y

This invention relates to'magnetl structures and more particularly` to the construe* tion of blow out magnets on electric Several arrangements have whereby the poles and arc shields of blowout magnets of switches or circuit breakers may be rotated about an axis to'expose the -contacts or circuit breaking points of the switch to permit inspection and repair. Otherf arra'ngenfrents` have been used where the whole blow-out magnet is removed when the contacts need attention. I y The object of my present invention 1s to provide a simple, compact and inexpensive i blow-out magnet possessing many commercial advantages over structures now in general use. This object is accomplished by constructing a blow-out magnet having the Jpoles with Vtheir arc shield separably con.

nected to the coreA ofthe magnet so that the core and poles are held/together by their own friction. In this way the poles and arc.`shields can be removed or drawn away instantly from the core, making the contacts,.which are normally4 in the .magnetic path between the poles, easily accesslble so 'thattheymay be inspected, repaired or re-4 4placed without delay'.

The various novel features of my invention will rbe described in the specification andfparticularly set forth in the appended claimsfV l The invention is ,illustratedin the accompanying sheets of drawings wherein-f Figure 1 is a side elevation, partially in section. of a magnetically actuated switch equipped with my invention, the switch be Ving here -shown in a closed posit1on; Fig. 2

been devised cal as possible.

the, blow-out magnet.

out magnet; Fig. 5 is a perspective View of` `my improved blowout magnetremoved from .its normal position; and, Fig. 6 is a. perspective view of the same, showing the pole pieces removed from the core.

Mounted upon' a suitable base 10 and supported thereby in any ordinary manner is a magneticallyA actuated switch which includes ltoo far when the energizing circuit is broken,

the armature is provided with a lug 20,--v

which is adaptedto engage a portion of the magnet core to limit the backward or. open#l ing movement of the armature. Secured to the back/of. the armature 18 by a screw 21 is a contact finger including metal strips 22 and,23 and a contact tip. 24 to which the metal strips are secured by a screw 25. The metal strip`22 is copper and the strip 23 is a piece of resilient steel comparatively sti in order to insure a firm contact between the movable contact tip 24 and a coperating stationary contact member 26 which it is adapted toengage. The stationary contact member 26 is mounted on a stop 27 which forms one extremity of a support 28 which is supported in any usual manner by the base 10. The support 28 is formed in two portions which are adapted to receive the terminals 29 and 30 of thewinding of the blowout magnet 31. This blow-out magnet is designed to make it as simple and practi- Its parts, especially the poles and coreare capable 'of.,being shifted relatively to each other so that access may normally located in the magnetic path of I The instantaneous or ready ladjustment of the parts, especially the connecting and disconnecting of the core and the pole structure of the magnet is accomplished by merely sliding one member relative t`o the other without the use of tools. It isito be noted that friction'between the coreand poles is depended upon, to hold these parts together under normal operating conditions. As here shown the magnetic. 105

winding 32 is supported on a spool 33 be had to thecontacts 24 and 26, whichl are through the middle of which passes the magnet core 34. I.

' In the ordinary construction of blow-out magnets the poles 35 and 36 are bolted to the core so that when it is desiredl to inspect the contacts the poles are removed from theirnormal operating position by rotating the poles with the core about the axis of the core. 'But 4 here I have shown the poles, which embrace the relatively'movable contacts, secured together by bolts or rivets 37 and forced into Contact withv the core 34, andv being held 'thereto by friction between the poles and the end portions of the core. The poles are held a predetermined distance apart by a supporting and spacing member y 38 through which pass the rivets 37. vWith over the core ends and into engagementtherewith, they will be frictionally retained in such positionI` by their inherent resiliency. The frictional grip of the poles on'fithe core can be ysuiiicient, of itself2 to hold the poles and arc shields in any position in which they are set relatively yto the core. yThe spacing member 38engages `the spooll 33 and is `adapted to engage and rest upon the stop 27 thus limiting the movement of the poles lin certain directions and balancing Aor steadying the poles to prevent their shaking loose from the core. By means of .this ar rangement the poles 35 and` 36 with their arc deflectors 39 and 40 respectively may be readily secured to and withdrawn from-the core of the blowut magnet so that access may instant. p y

A slight modification of the\device shown in Fig. `lis illustratediny Fig. 3 whereinv there is provided a stop 41 with a lock portion 42 which is adapted -to receive the' spacing member 43 to "retain the unit inL cluding the poles, their arc deiectors and spacing member 43`in a fixed position. IIn this arrangement any tendencyy for .the poles to pull out of engagement with the core by vibrationsl'or any other incidental movements or jars which may be occasioned is overcome. 'If itfis desired to remove the poles and arc A shields as a unit from the@ core of the blowout `magnet it is merelynecessary to take! hold of the poles and draw 4them, preferably i ain a straight line, from the core. In placing the poles back in contact with the core ready for active service it is merely necessary to press the narrow ends 44 of the poles along be had to the contact members at anyY the spools until the'ends of said poles firmly engage the core where they are held by friction between the poles and core.

Vhen the switch is inclosed position, as indicated in Figs. 1 and 2, the current passes in through conductor 45 terminal 30, magnet winding 32, terminal 29, stationary contact 26, contact 24, metal stripsy22 and 23, body portion 12 of the core 11, and out through conductor 46. When the switch is in this closed position a member 47, which is secured in the lower part of the actuating member 18 and provided'with an insulating sleeve 48, engages a spring switch member 49 which in this position permits aj. resistance 51 to be inserted in series with the magnet winding 13 to reduce the current flow in .it while the switch is being actively employed. When lthe switch is permitted toA open the sleeved member 47 is swung about the pivotal point 19 permitting the switch l'member 49 to come inv contact with its cooperating contact 50 to short-circuit the resistance 5/1 which is normally in the circuit of the actuating winding 13. f

The blow-out magnet structure may be arranged in different positions with respect to the switch and may be used in connection with many other pieces of electrical apparatus; there maybe many modifications L of the precise form and arrangement herein vShown and described, and I intend to cover all such modifications and arrangements whichdo not involve a departure from the spirit and scope of my' invention as set forth in the appended claims.

- What I claim as new is:

1. A blow-out magnet lincluding a core and poles, said poles being removably held ,in engagement with said core by the frictional engagement of said parts.

2. In combination, a switch having relaf tively movable contact members, and ablowout magnet including a lcore and poles, said poles embracing said contacts and being removably held in yielding engagement with said core. .Y

3. In combination, a switch having relatively movable contact members, a blow-out magnet including a #core and poles, said poles embracing said contacts and said core and removably held-in position thereon by the frictional engagement of said parts, and

means to limit the relative movement of said core and poles. l i

14. ,In combination, .a switch having-relatively movable contact members, and a blowvout magnet'includinga core and-a pair of poles spaced apart and connected by nonmagnetic material, said" poles embracing said contacts and said poles and removably held in engagement 'with said core by the frictional engagement of the parts.

' 5. In a blow-out magnet, the combination of a winding, a. metal member extending through saidlwinding, and poles having arcing shields, said poles embracingsaid metal member and lremovably held thereto solely by the frictional engagement of the parts.

6. In a magnet,: the combination of a winding, a metal path in which. flux is set up by said winding, said metal path com# prising separable portions removably held together by the frictional engagement of the parts, and means for limiting relativemovement between said portions.

7. In a magnet, the combination of a Winding, and a metal path in which flux isfv set up by said winding, said metalfpath comprising separable portions removably held together by the frictional engagement -between said portions. v y

8. In a magnet, the combination of a core, poles removably held in engagement with said core solely bythe friction between said poles and core, and means to prevent relative movement between said core andfpoles when said poles are in operative position on 'said` core.

9. In combination, a switch having relatively movable contacts, and a blow-out magnet including a winding, and a metal pathk for flux set up by said- Winding, said metal path comprising a part embraced by said .winding and sections embracing said in the presence contacts and removably held in yielding engagement with the part embraced by said winding. p

10. In a magnet, a core and a plurality of spaced and connected pole pieces., said pole pieces .embracing and removably' held in engagement with said core by the resiliency of the pole pieces.` f

11. In a blow-out magnet, a magnetic path gether and removably held in yielding operative engagement with said core and being removable therefrom by forcible withdrawal.

13. In a magnet, a core, and a plurality of. spaced pole pieces magnetically connected together and removably held in yielding engagement with said core. y

In testimony whereof` I aiiX my signature,

of two witnesses.

HALFDAN A. STEEN.

Witnesses CHAs. L. BYRON, LAURA HUENNEKENS. 

